The mouth may be one place that signs of celiac disease or gluten sensitivity are manifested, according to a recent study by researchers at Dalhousie University, in Halifax, Nova Scotia. They discovered a link between the disorder and dental enamel defects and recurrent aphthous ulcers, or canker sores, and concluded that dentists can play an important role in identifying unrecognized celiac disease. Appropriate referral and timely diagnosis can help prevent serious complications.